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Zhang Z, Wang H, Zheng J, Yu X, Liu F, Zhao J, Liu Y, Zhang M, Xia C, Cao J. Electrochemical Phenyl-Carbonyl Coupling Reaction of Aromatic Aldehydes or Ketones. J Org Chem 2023; 88:15687-15695. [PMID: 37918975 DOI: 10.1021/acs.joc.3c01677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
An electrochemical phenyl-carbonyl coupling reaction of aromatic aldehydes or ketones to synthesize 4-(hydroxy(phenyl)methyl)benzaldehyde derivatives has been developed. The method shows high chemoselectivity, broad functional group compatibility, atom economy, and environmental benignity and has good potential applicability.
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Affiliation(s)
- Zenghui Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Haiyang Wang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
- State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jinhua Zheng
- Tai'an Center for Disease Control and Prevention, Tai'an 271000, China
| | - Xiao Yu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Fusheng Liu
- State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jinbo Zhao
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Yi Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Mei Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Chengcai Xia
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
| | - Juan Cao
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, P. R. China
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2
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Pandey AM, Mondal S, Gnanaprakasam B. Continuous-Flow Direct Azidation of Alcohols and Peroxides for the Synthesis of Quinoxalinone, Benzooxazinone, and Triazole Derivatives. J Org Chem 2022; 87:9926-9939. [PMID: 35867027 DOI: 10.1021/acs.joc.2c00941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Continuous-flow reactors provide an ideal tool for the synthesis of potentially explosive but synthetically useful organic substances like organic azides due to their intrinsically small volume leading to very effective collision and highly controlled reaction conditions. Herein, we report the continuous-flow direct azidation of various alcohols by using TMSN3 as an azide transfer reagent in the presence of Amberlyst-15 as a recyclable catalyst. Numerous 3-hydroxy-2-oxindoles effectively undergo azide transfer to afford azide-functionalized quaternary stereocenters in a continuous-flow module. Interestingly, peroxyoxindole undergoes sequential skeletal rearrangement to generate a carbocation followed by nucleophilic azidation to afford a library of substituted 2-azido-2H-benzo[b][1,4]oxazin-3(4H)-one derivatives under continuous flow. Furthermore, a continuous-flow Cu-catalyzed click reaction afforded triazole-functionalized deivatives. Next, reduction of azide in the presence of PPh3 affords the amine derivatives in good yields. The continuous-flow application was extended further for the thermolytic skeletal rearrangement of 3-azide-2-oxindole for the synthesis of biologically important quinoxalin-2(1H)-ones without any reagents. Furthermore, this continuous-flow direct azidation reaction is scaled up to 6.144 g of azides with a turnover number of 9.24 under safer conditions.
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Affiliation(s)
- Akanksha M Pandey
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Shankhajit Mondal
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
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3
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Hikawa H, Nakayama T, Nakamura S, Kikkawa S, Azumaya I. Dehydrative amination of benzhydrols with electron-withdrawing group-substituted 2-aminopyridines utilizing Au(III)/TPPMS catalyst system in water. Org Biomol Chem 2022; 20:4183-4188. [PMID: 35537142 DOI: 10.1039/d2ob00673a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a method for gold(III)/sodium diphenylphosphinobenzene-3-sulfonate (TPPMS)-catalyzed direct amination of benzhydrols using 2-aminopyridines with poor nucleophilic character in water. Various functional groups such as electron-withdrawing nitro, cyano and halogen groups were tolerated well to form the desired N-benzylated 2-aminopyridine compounds. On the basis of mechanistic studies including kinetic profiles, Hammett study and isotope effects, we propose a pathway in which a Lewis acidic gold cation species activates the sp3 C-O bond of the alcohol in the rate-determining step.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Taku Nakayama
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Shunki Nakamura
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
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4
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Almaghrabi M, Bolshan Y. Metal‐Free Derivatization of Benzhydrols with Organosilanes. ChemistrySelect 2022. [DOI: 10.1002/slct.202103928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mona Almaghrabi
- Faculty of Science Ontario Tech University 2000 Simcoe Street North Oshawa Ontario L1H 7K4 Canada
| | - Yuri Bolshan
- Faculty of Science Ontario Tech University 2000 Simcoe Street North Oshawa Ontario L1H 7K4 Canada
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5
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Regier J, Ghanty S, Bolshan Y. Stereoselective Palladium-Catalyzed Arylation of Exo-Glycals with Aryl Iodides. J Org Chem 2021; 87:524-530. [PMID: 34958570 DOI: 10.1021/acs.joc.1c02533] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel methodology for the arylation of exo-glycals has been developed. A range of exo-glycals underwent reactions with aryl iodides in the presence of a palladium catalyst. The transformation proceeded in a stereoselective manner to afford Z-isomers. The developed transformation demonstrated excellent functional group tolerance.
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Affiliation(s)
- Jeffery Regier
- Faculty of Science, Ontario Tech University, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Supriya Ghanty
- Faculty of Science, Ontario Tech University, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Yuri Bolshan
- Faculty of Science, Ontario Tech University, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
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Prasad SS, Joshi DR, Kim I. BF3·OEt2-catalyzed one-pot three-component access to diarylmethylazides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Estopiñá‐Durán S, Taylor JE. Brønsted Acid-Catalysed Dehydrative Substitution Reactions of Alcohols. Chemistry 2021; 27:106-120. [PMID: 32491202 PMCID: PMC7820959 DOI: 10.1002/chem.202002106] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 12/13/2022]
Abstract
The direct, catalytic dehydrative substitution of alcohols is a challenging, yet highly desirable process in the development of more sustainable approaches to organic chemistry. This review outlines recent advances in Brønsted acid-catalysed dehydrative substitution reactions for C-C, C-O, C-N and C-S bond formation. The wide range of processes that are now accessible using simple alcohols as the formal electrophile are highlighted, while current limitations and therefore possible future directions for research are also discussed.
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Affiliation(s)
- Susana Estopiñá‐Durán
- Department of ChemistryUniversity of BathClaverton DownBathBA2 7AYUK
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughSt AndrewsKY16 9STUK
| | - James E. Taylor
- Department of ChemistryUniversity of BathClaverton DownBathBA2 7AYUK
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Xiu H, Li T, Song C, Ma Y. Azidative Aromatization of Quinone Methides Under Transition Metal and Solvent Free Conditions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000900] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Haiping Xiu
- School of Pharmaceutical Science Shandong University Wenhua Road No. 44 250012 Jinan P. R. China
| | - Tingting Li
- Department of Chemistry Shandong University Shanda South Road No. 27 250100 Jinan P. R. China
| | - Chun Song
- School of Pharmaceutical Science Shandong University Wenhua Road No. 44 250012 Jinan P. R. China
- State Key Laboratory of Microbial Technology Binhai Road No. 72 266237 Qingdao P. R. China
| | - Yudao Ma
- Department of Chemistry Shandong University Shanda South Road No. 27 250100 Jinan P. R. China
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